Scripting an on/off radio

[TheGreatCthulhu]

Wouldn't it also be necessary to increment/decrement the Radio variable in the case that the radio sound was to be toggled? Unless I had misinterpreted and this is not what the OP specified.

Yyy, you're right
In the case of the code above, it would be:

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if(GetLocalVarInt("Radio") == 0)   // 0 means "currently off" - so turn it on
{
    PlaySoundAtEntity("id.sound.radio", "radio.snt", "radioarea", 0.0, false);  // 0.0 - fade in time
    SetLocalVarInt("Radio", 1);   // set it to "currently on"
} 
else  // local var "Radio" is 1, that is: "currently on" - so turn it off
{
    StopSound("id.sound.radio", 0.5f); //Change 0.5f to how long you want the sound to fade out.
    SetLocalVarInt("Radio", 0);   // set it to "currently off"
} 


Also, the way the code is setup, it should start with:

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void OnStart()
{
    SetLocalVarInt("Radio", 0);   // 0 instead of 1
    // etc...